shuffle和random_shuffle c ++之间的区别是什么 [英] What is the difference between shuffle and random_shuffle c++

问题描述

函数 std :: shuffle 已在C ++ 11中引入：

The function std::shuffle has been introduced in C++11:

template< class RandomIt, class URNG >
void shuffle( RandomIt first, RandomIt last, URNG&& g );

，它具有与 std::random_shuffle 这也是在C ++ 11中引入的：

and it has the same signature as one of the overloads of std::random_shuffle which was also introduced in C++11:

template< class RandomIt, class RandomFunc >
void random_shuffle( RandomIt first, RandomIt last, RandomFunc&& r );

区别在于第三个参数，其中：

The difference is in the third parameter where:

URNG必须符合UniformRandomNumberGenerator的要求

URNG must meet the requirements of UniformRandomNumberGenerator

这是全部吗？是不是只是 shuffle 执行额外的编译时检查？

Is this all? Is the difference just that shuffle performs an extra compile time check? Is the behavior otherwise the same?

推荐答案

如果您仔细阅读cppreference.com上的文档，您会发现传递给 Random_shuffle 的RandomFunc 具有不同的接口。它被作为 r（n）调用。这存在于C ++ 11之前。

If you read the documentation at cppreference.com closely, you will find that the RandomFunc passed to random_shuffle has a different interface. It is invoked as r(n). This existed before C++11.

std :: shuffle 使用一种标准化的方式获取随机数和调用 g（）。这个标准化的随机数生成器引入了C ++ 11和 std :: shuffle 。

std::shuffle uses a standardized way of getting random numbers and invokes g(). This standardized random number generators where introduced with C++11 together with std::shuffle.

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